COMPARISON　BETWEEN　RECENT　PILLOW LAVAS　AND ANCIENT　ANALOGUES

Thursday, 2 February 2017
Marina/Gretel (Hobart Function and Conference Centre)
Hiromitsu Yamagishi, Shin Engineering Consultant Co. Ltd., Spatial Information Division, Sapporo, Japan; Asian Institute of Space Information, Sapporo, Japan
Abstract:
Recently many pillow lavas and associated rocks were taken photographs along the East Pacific Rise by submersible of JAMSTEC, Japan (http://www.godac.jamstec.go.jp/jedi/e/index.html

In 1985 Yamagishi proposed a model of pillow lobes in publishing articles on the Journal of Geology etc. And then, I published a book in title of “Subaqueous Volcanic Rocks “ (Hokkdaido University Press, 1993) . In the articles and the book, I was defining many surface structures(Fig.1) such as ropy wrinkles, corrugations (A and B) , spreading cracks (longitudinal and transverse), constriction, contraction cracks etc., on the ancient pillow lobes of different depth and environment from Precambrian to Quaternary. In this presentation, I am comparing the surface structures between the JAMSTAC data base of pillow lavas, and the analogues in the ancient ages.

JAMSTEC E-library of Deep-sea Images (J-EDI) http://www.godac.jamstec.go.jp/jedi/e/index.html Yamagishi (1985) Growth of pillow lobes—Evidence from pillow lavas of Hokkaido, Japan, and North Island, New Zealand, Geology, v.13:499-502.

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